We review the basics and recent developments of generalized hydrodynamics (GHD). New dynamical phenomena that have been discovered in the study of GHD are also briefly discussed.
Magnetic skyrmions are particle-like nanometric magnetic textures characterized by a quantized topological invariant. In this article, we discuss our recent theoretical discovery that thermally activated skyrmions show an activematter behavior called “chiral swimmer” through interacting with a flower-like chiral obstacle in a ferromagnetic specimen, which could cause outcomes that depend on the topology of the skyrmion (+1 or -1) and the chirality of the obstacle (right-handed or left-handed). This phenomenon can be regarded as a spontaneous order (skyrmion sorting) from disorder (Brownian motion) phenomenon driven by thermal fluctuations and topological nature of skyrmions. This finding might be used for a topology sorting technology and is expected to contribute to development of the chiral spintronics.
In this report, the self-diffusion coefficient of Li+(D JLi) and Na+(D JNa) in Lix CoO2 and P2-Nax CoO2 were measured during charge and discharge reactions between Lix CoO2 and Li metal electrodes and P2-Nax CoO2 and Na metal electrodes in the electrochemical half-cell using an operando muon spin rotation and relaxation ( μSR) technique through the observation of a fluctuating nuclear magnetic field.
We review recent progress and future prospects for studies of tidal effects of neutron stars and gravitational wave constraints on models for equation of state.